<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>登录验证-非常重要</title>
		<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
     	<script>
     		function checkUname(){
     			//用户输入的
     			username = $("#uname").val();
     			//验证规则（正则表达式）
     			reg = /^[a-zA-Z0-9]{3,10}$/;
     			if(!reg.test(username)){
     				$("#uname").css("border-color","red");
     				return false;
     			} else {
     				$("#uname").css("border-color","");
     				return true;
     			}
     		}
     		function checkUpsw(){
     			psw = $("#upsw").val();
     			reg = /^[0-9]{6}$/;
     			if(!reg.test(psw)){
     				$("#upsw").css("border-color","red");
     				return false;
     			}else {
     				$("#upsw").css("border-color","");
     				return true;
     			}
     		}
     		function checkAll(){
     			checkUname()  
     			checkUpsw();
     		}
    	</script>
	</head>
	<body>
		<h3>用户名是字母数字的组合，3-10个；密码6个数字</h3>
		用户名<input onblur="checkUname()" type="text" id="uname" />
		密码<input onblur="checkUpsw()" type="password" id="upsw" />
		<button onclick="checkAll()">登录</button>
	</body>
</html>
